Mold, bad smells, pollution, tobacco, pollen... The indoor air of a home is sometimes more polluted than outside air and can sometimes have harmful consequences on health (allergies, asthma, respiratory problems...). By using an air purifier adapted to your needs and your rooms (bedroom or living room), you limit this indoor pollution and find a healthy air.
What is an air purifier?
Air purifiers (or sanitizers) are devices designed to filter the air of a room to eliminate any source of indoor pollution and improve the quality of the air you breathe. They avoid the proliferation of microbes and bacteria.
Pollution can come from outside but also from inside. It can come from human activity such as cooking or tobacco, animal hair, or odorless like volatile organic compounds (VOCs) contained in the glue of furniture, paints or household products. Finally, a boiler, an insert or a poorly maintained chimney can also be responsible for a dangerous pollution with carbon monoxide.
The different types of air purifier
There are 3 large families of air fresheners that work on different technologies.
- Filtration purifiers
All polluting particles not the same size. To "catch" them, we use conventional filters or electronic devices.
Models to HEPA filter can filter almost 100% of particles by 0.3 μm, which is equivalent to about 80% of particles in indoor air.
Activated carbon filters are very efficient in capturing VOCs.
Electrostatic devices use the electrical charge of polluting particles to hold them in a filter.
In any case, it is necessary to change the filter regularly for the device to remain effective and to ensure its tightness.
- The photocatalyst air purifier
This device mimics the phenomenon of photosynthesis in plants. A light source produces UV which degrades the polluting organic molecules of the VOCs thanks to a catalyst, titanium dioxide.
- The ionizer air purifier
In this device, a strong electric field polarizes, in the form of negative ions, the particles present in the air and recovers them.
Choosing an air purifier
Your choice will depend on the use you want to make. If you are not fixed on its location, you can choose a model on wheels rather than a fixed model. If the purifier is intended for your room, it is better to avoid entry-level models that are often noisy.
To be effective, the sanitizer must operate at least once an hour. You must also take into account its power consumption, as well as the price of the filters and the frequency with which you will have to change them. Finally check that the volume of air treated corresponds to that of your rooms.
On the price side, the average is around 250 euros, but more upscale models can go up 800 euros.
Do not forget also that the VMC (mechanical controlled ventilation) has a very important role for the evacuation of pollutants and humid air from the house.